Friction-clutch.



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` BATE'NTED JULY 31, 1906 w. E. MAGIE. Y

FRIGTIDN CLUTCH. APPLIOATION 1111.31) 00T. za. 1904.

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WILLIAM MAGIE, OF SOUTH MILWAUKEE, WISCONSIN, .ASSIGNOR` vTO V THE BUCYRUS' COMPANY, OF SOUTH MILWAUKEE, AWIS'GON SIN, A OOR- IPORATION OF WISCONSIN. v

FnloTio'N-CLUTGH.

To all whom, ,it may concern.-

Be it known that I, WILLIAM E. MAGIE, a

- citizen of the-United States, residing in the city of South Milwaukee, county of Milwaukee, State of Vlisconsin, haveinvented cer-l tain new and useful `Improvements in Friction-Clutches; and I do hereby vdeclare the following to bea full, clear, and exact de,-

scription of the invention, such as will enable others skilled in the art to which it .appertains to make and use the same.' f

The invention'vrelates to friction-clutches,

f and-especially to those where the driving part lconsists of a band or ring which is pressed outward against the part to be'driven by. the toggle-like action of yokes that'ar'e pivotally con- 4nected to a collar sliding on the drivingsha'ft.

The articular objectin view is to provide a clutc Where the [gripping action between the driving anddriven parts will be the combined action of the ordinary'fshoe frictionclutch and of the ordinary -accumulative internal-frictionband clutch.

This inventionalso provides the tangential pressure to operate the internalfriction-band from the friction derived bythe shoe action of the clutch.

The invention also aims toproducea simple, durable, and efliclent construction lnvolvfing'but few partsand arranged so that ease and certainty of operation can be relied on.

The inventionis illustrated in the accompanying drawings, wherein- Figure l is a sectional view in the aXial line oftheA driving and driven parts. Fig. 2 isaa v face view looking into the clutch in the direc-y tion of the arrow kin Fig. 1.

Figs. 3 and 4 are sectional and side views of the disk-like driver that is securedto the shaft. Figs. 5 and ,are elevations of different forms ofthe friction band or ring, and Fig. 7 is a detail showing a 'l third form ofthe band.

tioniis transmitted 'from the shaft tothe driven part by a] driver c, that is Xedly secured `to and revolves'with the shaft. This driveris shown in detail in Figs. 3 and 4. It

i n points e eto accommodatethe operating. conil is in the'form ofl a' disk having a crown-flange 5oy d extendingV arounditsperiphery, the iiange being cut away-at the .diametrically opposite nections of a friction'bmd or ring j, that will Specification of .Letters Patent. y Application filed October 28, 1904. Serial No. 230,324.

for obtaining Referring to the views, la denotes the driving-shaft, Nand b thepart to be driven. Mo-

presently be described in detail. rrI he driven part has also the general form of a disk with'a crown-flange g extending allaroundlit s e-v riphery and forming a housing into which? ts the frictional contact ofthe ring orlban'd f.

This ringfits closely-upon the'ilange dof the driver c, as shown in Figs. "1' and"2. lIftfis a discontinuous or split ring, fas indicatedin Figs. 2 ,--5 G ,and 7, and encircles the flange of the driver loosely, being secured thereto only at'one point, and at that pointit'i-sffastened only in the sense of being prevented fromxmoving around the driver, as will be more fully describedlater-on.

The ring f is pressed outwardly agains'tthe inner surface of the housingiflange bymeans of yokes by pins Q', fi, that are riveted` to the ring at the=diarnet rically opposite points where the flange ofthe driver is cut away. The'yokes stra'ddle the shaft, as indicated in Fig. 2, and 'extend'ra'dih, that are connectedto-thefring PatentedfJ illy-.531,11906.

shaft independently of the. f

pivotally attached 'to' blocks fl ffl,

ally thereof from a collar m, that sli'desonjthe shaft and rotates with it andthe driving disk. The collar is operatedin a wellLknown way by avclutchflever, (not shown,) andthe yokes which are pivoted thereto operatezwithv a toggle-likey action to force the frictionbandoutwardly Whenever the collaris slid toward 'y the driving-disk. A g l Thebandf encircles the drivingdisk loos'ely which are secured to the flange of'th'edisk and overlap the-'edge' of theb'and. At one point in the disks circumference 'th'ebandiis secured thereto by a stop-bolt p, `whichs screwed into one of three-threaded openings o o o'2 in the disk flange from the'inn'ersifdeand'V has its end projecting'into alhol'e inthe band, so as to preventithe'b'and from'moving around on the disk, butl not sozas'topre'vem it from ready detachment therefrom. As assembled herein the shaft and drivingdisk revolve in the direction ofthex-arrowm Fig. 2, and it is tobe-notedthat the 'stof bolt yconnects the band with'the driving-'dis only at that .end of the band which is rearmos't'in 9o and isheld thereon by nuts andv washers'fn,

' that position.

. the

respect to the disks rotation. At all other points the band simply fits loosely around and upon the flange of the driver, and the object of securing it at the one point only is to secure the accumulative frictional action above referred to. When the clutch is assembled to rotate in the other direction, the friction-band is turned over, and the stopbolt is screwed into the opening 0, which, it will be noted, is on the opposite side of the center line of the shaft from the opening 0.

As above described, the clutch is intended to' drive only in one or the other direction, according as it is assembled, and is not reversible; but the invention also 'contemplates making the clutch reversibleQ. e., to drive in either direction without changing the stop-bolt or band--and to this end the flange of the driver is provided with a third threaded hole o3, the particular location of which with respect to the other openings is not important.

The band shown in Fig. 6 is provided with an opening to receive the end of the bolt, the opening being wholly within one end of the band. As thus constructed the band may have its position reversed from that indicated in Fig. 2, so that the opening will coincide with the threaded opening o on the other side of the shaft and so that it may be secured by changing the stop-bolt over to The band shown in Fig. 7 has the opening t formed partly in each end, and when it is desired to make the clutch reversible this band is used and is positioned so that the stop-bolt will secure it when placed in the opening o2. In this arrangement either end of the frieten-ring `will be secured to the driver, depending upon the direction of the drivers rotation, one end or the other of the band simplybringing up against the end of the bolt when rotation of the clutch begins.

The operation of the clutch will be readily understood from the above description. When the band is pressed outward against the housing, the friction tends to crowd its free end back against the stop-bolt, and this results in an increase or accumulation of the friction between the rubbing-surfaces in a direction backward from the free end of the band, the ultimate eect being an eX- ceedingly tight grip that is very effective in the driving operation and at the same time is quickly and easily released when the pressure is withdrawn.

In order to make the connection between yokes and the band adjustable, the pins have their stems screw-threaded into sleeves a; x, and these sleeves are clamped into openings i; i), provided for them in the outer edges of the yokes, this part of each yoke being furnished with a slit y, leading into the opening, so that by means of a screw or bolt be tightened up on the sleeve.

may be made in the connection between the yokes and the friction-rings without taking out the pins, it being only necessary to loosen the screw and turn the sleeve up or down on the stem of the pin.

In further explanation of the accumulative frictional action above described it is to be noted that if the band were fastened. to the driver at its front end the tendency would be simply to pull the band out straight, and its rear end being free there would. be no piling up of the frictional grip 5 but when the arrangement is reversed, as herein contemplated, and the front end of the band is free and its rear end only is connected to the driver the band is pushed around, as it were, and the frictional grip increases or accuinulates from the loose end to the fixed end, as already stated.

Having thus described my invention, what I claim isl. In a friction-clutch, the combination of a flanged disk-like driver secured to a rotating shaft, a driven housing loose on the shaft and havinCr a flange encircling that of the driver, a sp 't ring carried by the flange of the driver, a collar slidinfr on the shaft and having a toggle-like yo ie pivoted thereto, a block secured to the ring, and a pin pivoted to the block and having a screw-threaded stem taking into an openin(i in the yoke.

2. In a friction-clutch, the combination of a flanged disk-like driver seciued to a rotating shaft, a driven housing loose on the shaft and having a flange encircling that ofthe driver, a split ring carried by the flange of the driver, a collar slidiini on the shaft and have ing a toggle-like yoe pivoted thereto, a block secured to the ring, a pin pivoted to the block and having a stem screw-thread ed into a sleeve, and an adjustable opening in the yoke in which the sleeve is clamped.

3. In a friction-clutch, the combination of a flanged disk-like driver secured to a rotating shaft, a driven housing loose on the shaft and having a flange encircling that of the driver, a split ring carried by the flange of the driver, a connection between said split ring and said' driver at one point only in the circumference of the driver, said connection being adapted to be changed from one side of the split in the ring to the other, and means for forcing the split ring into engagement with the driver-housing.

4. In a friction-clutch, the combination of a flanged disk-like driver secured to a rotating shaft, a driven housing loose on the shaft and having a flange encircling that of the driver, a split ring carriedby the flange of the driver and secured thereto at one point only in the circumference of the driver, and means engaging the inner face of said ring for press- IOC IIO

ing the ring radially outward against the flange of the housing at a different point in the drivers circumference. y

5. In a friction-clutch, the combination of. a llanged disk-like driver secured to a rotating shaft, a driven housing loose on the shaft and having a flange encircling that of the driver, a split ring carried by theflange of the driver and adapted to be secured thereto at one point only in the circumference oit' the driver, means for connecting the' ring to the driver at that end of the ring rearmost in the direction of rotation, and means engaging the inner face of said ring Jfor pressing the latter against the housing.

6. In a Jfriction-clutch, the combination of a anged disk-like'driver secured to a rotating shaft, a driven honsing loose on the shaft f driver' and adapted to be secured thereto at one point only in the circumference of the driver, an adjustable stud for changing the point of connection between the ring and the driver, Which stud may be made to occupy one of several positions on the flange of the driver and means for pressing the ring into engagement With the housing In testimony whereof I aiiix'my signature in presence of tWo Witnesses.

` WILLIAM E. MAGIE.

Witnesses:

HARRY B. IIAYDEN, PAUL C. BoDE. 

